Writing instrument



FIG. 1 is a side elevational view of a writing instrument showing my new design, the opposite side being a mirror image thereof;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a side elevational view of a second embodiment of my design of FIG. 1, the opposite side being a mirror image thereof;

FIG. 7 is a bottom plan view of FIG. 6;

FIG. 8 is a top plan view of FIG. 6;

FIG. 9 is a front elevational view of FIG. 6; and,

FIG. 10 is a rear elevational view of FIG. 6. 

The ornamental design for a writing instrument, as shown and described. 